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MRAC
MRAC Set-1
Refrigerant and Insulation
17

Refrigerant and Insulation MCQ with Answers

17) Which refrigerant is inactive to ozone layer?

R 12

R 13

R 22

R 134a

Answer is:

R 134a

Refrigerant and Insulation MCQ with Answers

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Related Refrigerant and Insulation MCQ with Answers

18) Which is the numerical designation of ammonia refrigerant?

700 + ( Molecular mass of NH3) = 717

700 + (Molecular mass of NH3) = 718

700 + (Molecular mass of NH3) = 719

700 + (Molecular mass of NH 3) = 720

Answer is:

700 + ( Molecular mass of NH3) = 717

19) What does the number 4 of R 134a indicate?

Number of hydrogen atoms

Number of chlorine atoms

Number of carbon atoms

Number of fluorine atoms

Answer is:

Number of fluorine atoms

20) Which substance absorbs heat and directly changes its state from solid to vapour?

Ice

Dry ice

Primary refrigerants

Secondary refrigerants

Answer is:

Dry ice

21) Which is the effective method for refrigerant recovery?

Condensing unit

Charge migration

Push pull recovery

Use of system's compressor

Answer is:

Push pull recovery

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